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3515253
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Patent number 3,515,253
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Issue date Jun 2, 1970
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B66 - HOISTING LIFTING HAULING
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3349893
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Patent number 3,349,893
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Issue date Oct 31, 1967
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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3338380
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Patent number 3,338,380
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Issue date Aug 29, 1967
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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3317030
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Patent number 3,317,030
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Issue date May 2, 1967
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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3297144
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Patent number 3,297,144
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Issue date Jan 10, 1967
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL